reflection: Reifies arbitrary terms into types that can be reflected back into terms

[ bsd3, data, dependent-types, library, reflection ] [ Propose Tags ]

This package addresses the configuration problem which is propagating configurations that are available at run-time, allowing multiple configurations to coexist without resorting to mutable global variables or System.IO.Unsafe.unsafePerformIO.

That package is an implementation of the ideas presented in the paper "Functional Pearl: Implicit Configurations" by Oleg Kiselyov and Chung-chieh Shan (original paper). However, the API has been streamlined to improve performance.

There are a handful of tutorials on how to use this library:


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Flags

Manual Flags

NameDescriptionDefault
template-haskell

You can disable the use of the `template-haskell` package using `-f-template-haskell`.

Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

Enabled
Automatic Flags
NameDescriptionDefault
slow

If you enable this flag, we use a more portable much much slower implementation. Moreover, the Given API is broken, so this is currently an unsupported configuration. If you feel the need to turn on this flag for any reason, please email the maintainer!

Disabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

Downloads

Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.

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Versions [RSS] 0.0.0, 0.1.0, 0.1.1, 0.2.0, 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.3.5, 0.4.0, 0.4.0.1, 0.4.0.2, 0.4.1, 0.4.1.1, 0.5, 0.5.0.1, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.5.1, 1.1.6, 1.1.7, 1.2.0.1, 1.3, 1.3.1, 1.3.2, 1.4, 1.5.1, 1.5.1.1, 1.5.1.2, 1.5.2, 1.5.2.1, 2, 2.1, 2.1.1, 2.1.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.1.6, 2.1.7
Change log CHANGELOG.markdown
Dependencies base (>=2 && <5), semigroups (>=0.11 && <0.21), tagged (>=0.4.4 && <1), template-haskell [details]
License BSD-3-Clause
Copyright 2009-2013 Edward A. Kmett, 2012 Elliott Hird, 2004 Oleg Kiselyov and Chung-chieh Shan
Author Edward A. Kmett, Elliott Hird, Oleg Kiselyov and Chung-chieh Shan
Maintainer Edward A. Kmett <ekmett@gmail.com>
Revised Revision 1 made by ryanglscott at 2023-09-30T12:49:12Z
Category Data, Reflection, Dependent Types
Home page http://github.com/ekmett/reflection
Bug tracker http://github.com/ekmett/reflection/issues
Source repo head: git clone git://github.com/ekmett/reflection.git
Uploaded by ryanglscott at 2023-02-28T12:10:22Z
Distributions Arch:2.1.7, Debian:2.1.6, Fedora:2.1.7, FreeBSD:2, LTSHaskell:2.1.7, NixOS:2.1.7, Stackage:2.1.7, openSUSE:2.1.7
Reverse Dependencies 93 direct, 7664 indirect [details]
Downloads 212260 total (340 in the last 30 days)
Rating 2.25 (votes: 2) [estimated by Bayesian average]
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Status Docs uploaded by user
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Readme for reflection-2.1.7

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reflection

Hackage Build Status

This package provides an implementation of the ideas presented in Functional Pearl: Implicit Configurations by Oleg Kiselyov and Chung-Chieh Shan. However, the API has been implemented in a much more efficient manner.

Contact Information

Contributions and bug reports are welcome!

Please feel free to contact me through github or on the #haskell IRC channel on irc.freenode.net.

-Edward Kmett